九、密码比较

在realm中 认证成功后会返回 return new SimpleAuthenticationInfo(username,md5, getName());

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认证成功成功拿到 info 放下执行到 assertCredentialsMatch（token,info）;

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 public abstract class AuthenticatingRealm extends CachingRealm implements Initializable {
 
protected void assertCredentialsMatch(AuthenticationToken token, AuthenticationInfo info) throws AuthenticationException {
    CredentialsMatcher cm = getCredentialsMatcher();
    if (cm != null) {
        if (!cm.doCredentialsMatch(token, info)) {
            //not successful - throw an exception to indicate this:
            String msg = "Submitted credentials for token [" + token + "] did not match the expected credentials.";
            throw new IncorrectCredentialsException(msg);
        }
    } else {
        throw new AuthenticationException("A CredentialsMatcher must be configured in order to verify " +
                "credentials during authentication.  If you do not wish for credentials to be examined, you " +
                "can configure an " + AllowAllCredentialsMatcher.class.getName() + " instance.");
    }
}
 
}
 

cm.doCredentialsMatch(token, info) 这里可以使用默认的密码比较器 或者使用自定义的密码比较

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我这里是自定义 密码校验 很简单就是继承上面图中的类 画横线的过时了 实现doCredentialsMatch 方法

public class Md5HashCredentialsMatcher extends SimpleCredentialsMatcher {

    @Override
    public boolean doCredentialsMatch(AuthenticationToken token,
                                      AuthenticationInfo info) {

        UsernamePasswordToken usertoken = (UsernamePasswordToken) token;

        //注意token.getPassword()拿到的是一个char[]，不能直接用toString()，它底层实现不是我们想的直接字符串，只能强转
        Object tokenCredentials = Encrypt.md5(String.valueOf(usertoken.getPassword()), usertoken.getUsername());
        Object accountCredentials = getCredentials(info);

        //将密码加密与系统加密后的密码校验，内容一致就返回true,不一致就返回false
        return equals(tokenCredentials, accountCredentials);
    }


}

然后在spring-shiro.xml 中配置一下